What does it mean to have a circle of people in the photos of QQ space? What's the use?

Everyone in the circle is a @ friend, and the other party will receive a reminder message to check the photos.

Download and install mobile QQ space and log in;

Open my space-say, just find a place to circle people;

Click on the picture to browse the picture, and then click on the portrait icon below;

Click on the photo and select the friend in the photo. Click again to enter the friends list, from which you can select a friend.